2.5(12.75x + 24.50) = 188.75
31.875x + 61.25 = 188.75
31.875x = 188.75 - 61.25
31.875x = 127.50
x = 127.50 / 31.875
x = 4....they worked 4 hrs
Https://www.khanacademy.org/math/in-sixth-grade-math/ratio-and-proportion/unitary-method/v/finding-unit-rates
No I don’t think so (&/&/ need extra characters)
Because the lines are parallel, 75 is equal to 11x-2
75=11x-2
77=11x
x=7
General Idea:


Conclusion:
Amount of interest that Lucy to be charged in a typical month is <u>$9.75</u>